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(No Model.) 3 sheets-sheen 1.

H. H. ROCKWELL. GANG BORING'MAGHINB.

No. 560,234. Patented May 19, 1896.

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H. H. ROGKWBLL. GANG BORING MACHINE.

No. 560,234. Patented May 19, 1896.

1 f l r ANDREW aAnAMvFnUTO-UTMUNIASHINGTON DC (No Model.) 3 sheets-smeta.

lei` H. ROCKWELL. GANG BORING MAGHINB.

No. 560,234. Patented MaylQ, 1896.

ANDREW BAGRAHAM. PHOTD umawASmnGmN C ilNiTnn STATES HEXRY H. ROCIUYELL,OF

PATENT @Trina MILVAUKEE, TISCONSIN.

GANG BORING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 560,234, dated May 19,1896.

Application filed May l5, 1893. Serial No. 474,266. (No model.)

To a/ZZ whom, it' may concern.'

13e it known that I, HENRY Il. RocKwnLL, of Milwaukee, in the county ofMilwaukee and State of 'isconsimhave invented certain new and usefulImprovements in Gang Boring-ilachines, and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings, andto the letters of reference marked thereon, which forln apart ol' thisspecification.

The main object of my invention is to bore in a single operation one ormore series of holes.

It consists of certain peculiarities in the construction and arrangementof the component parts of the ina-chine hereinafter particularlydescribed, and pointed out in the claims.

In the accompanying drawings like letters designate the same parts inthe several figures.

Figure l is a front elevation of a machine cmbodyin g my improvements,portions thereof being broken away and shown in vertical cross-section.Fig. 2 is a side elevation with portions of the machine broken away anda portion at one end shown in vertical section on the line 2 2, Fig. l.Fig. 3 is a plan view of a portion of the machine. Fig. i is a like viewof the feeding and stopping mechanism; and Fig. .5 is a horizontalsection on the line 5 5, Fig. i.,

A represents the main frame, which is formed or provided on the upperside with longitudinal horizontal ways a a.

B B are yokes mounted and adjustable laterally lengthwise of the machineupon the ways d a and provided at or near the ends with boxes for thebit-mandrels. They are secured and rigidly held in place when adjustedby clamping bars or plates l), attached to the under sides thereof andunderlapping at their ends the ways o. o, as shown in Figs. l and 2.These yokes are preferably formed in two parts, as shown in Fig. l,separable in a horizontal plane to permit of a slight verticaladjustment of the bit-mandrels and the perfect alinement of the bitswithout the neccssity of frequently babbitting the mandrelboxes to keepthe mandrels in perfect alinement. The vertical adjustment and alinementof the mandrels are effected by loosening the screws by which the partsof the yokes are attached to each other and placing between them ateither or both ends shims of the required thickness.

C C are the bit-mand rels, which are provided with pulleys c c and atboth ends with chucks or bit-holders c c. The pulleys c c on adjacentmandrels are arranged out of line with each other, so as to permit ofbringing the bits close together. The construction and arrangement ofthe boxes at the ends of said yokes are also such, as shown in Fig. 3,as to permit of a close arrangement of adjacent mandrels.

D D represent bits, which are necessarily made right and left for use inmy machine.

E E are parallel horizontal driving-shafts arranged lengthwise of themachine below the bit-mandrels and provided with suitable bearings at ornear the ends in cross-pieces of the frame. They are provided withpulleys e c, which are connected by quarter-twist belts with the pulleysc c upon alternate bit-mandrels, the pulleys on each driving-shaft beingconnected with the mandrel-pulleys nearest the same side of the machine.The pulleys e e are secured upon said shafts by any means (not shown)which will permit of their adjustment lengthwise thereof to correspondwith the adjustments of the bit-mandrels with which they are connected.Each drivingshaft is provided with a pulley e', as shown in Fig. 2,through which power is communicated thereto from any suitable source.

The frame A is provided on each side with brackets F F, mounted andmovable vertically upon ways a d on said frame and formed on their uppersides with horizontal ways ff, arranged at right angles to the ways a o.These brackets are adjusted and held in place by the screws f' f',having fixed bearings in boxes a? (t2 on the frame and provided at theirlower ends with bevel-gears f2j`2.

G G are horizontal shafts supported in suitable bearings one on eachside and lengthwise of the machine. They are provided with bevel-gears gg, meshing with the gears f2 f2 and at their front ends, withinconvenient reach of the operator, with cranks gl g.

H H are work-supporting beds or carriages, arranged one on each side ofthe machine parallel with the ways a o and movable trans- IOO verselythereto upon the ways ff. They are formed with longitudinal ways 71l 7iIand are provided with longitudinal back guides I I and with frontspring-guides i e', adjust-ably held in vertical spindles if 17, whichin turn are adjustably secured in holes or sockets in the inner sides ofsaid beds.

K K are standards, mounted and adjustablelengthwise of the machine uponthe ways 7L 7L and formed with inwardly-proj eeting vertical sleeves 7e7.3, overhanging the work-supporting beds. They are also provided withset-screws 7e 7e', by which they are secured in any desired positionupon their supportingways.

L L are presser-feet, formed with shanks which are movable verticallyand held from turning in the sleeves 71; 7e. Hare adjustingscrews,threaded axially in the shanks of said presser-feet and having fixedbearings in perforated ears formed on said standards above or in linewith the sleeves 7s 7.5. They are provided at their upper ends withbevelgears 7' 7.

M M are horizontal shafts, arranged one on each side and lengthwise ofthe machine. They are provided with bevel-gears m lm, which are freelymovable lengthwise thereon and are loosely held by their hubs inengagement with the gears 7y 7' in brackets 7.12 7a2 on the standards KK. The shafts M M are prevented from turning in said gears on fm, bysplines, feathers, or other suitable means. The two standards K K at therear end of the machine may be permanently secured to the beds orcarriages II II, but all of the other standards are adjustable thereonlengthwise of the machine, so as to cause the presser-feet to operate atthe desired points upon stuff of different lengths.

N is a horizontal shaft, supported lengthwise of the machine by suitablebearings in the upper part of frame A and provided at or near the endswith pinions 'n 01, which mesh with similar gears O O on opposite sidesthereof. It is also provided at one end with a tight and a loose pulleyn and n2. The gears O O are mounted upon studs projecting from the endsof the frame and are provided with crank-pins o o, which are connectedby rods o o' with the ends of the work-supporting beds or carriages IIII. Abelt connects, through the pulley 91. or pulley n2, with a pulleyon a counter or driving shaft. (Not shown.)

P is an angular belt-shifting lever, formed with a fork or loop p,through which the belt passes to the pulleys n and n2 and fulerumed at pto a bracket attached to the frame A, so as to swing horizontally. It isprovided with a dog p2, pivotcd toits outer end so as to be turned bythe operator into and out of range with a pin or projection p3,at-taehed to the adjacent carriage Hin position to shift the belt fromthe tight pulley n upon the loose pulley n2, as the carriages arewithdrawn into their outer positions. By this arrangement,

when the dog p2 is turned inwardly, the carriages are automaticallystopped in their outer positions after each advance and return movementthereof.

Hy improved machine operates as follows: The bit mandrels having beengrouped and set in the desired positions, the standards K Kcorrespondingly adjusted to cause the presserfeet L L to bear at theproper points upon the stuff to be held, and the carriages II IIadjusted to the proper height according to the thickness of the stuff tobe operated upon, by means of the shafts G G and screws f j" gearedtherewith, the presser-feet are raised by means of the crank-shafts M Mand intergeared screws 7 7, and the pieces are inserted by the operatorat the front end of the machine endwise between the back guides I andthe front spring-guides i i, which press and hold them snugly againstsaid guides I I. The presser-feet are then forced by the operator downupon said pieces and clamp the same snugly and firmly to the beds of thecarriages. The dogp2 of the bel t-shifter is then raised out ofengagement with the pin p3 and the lever I turned manually, so as tocarry the belt from the loose pulley n2 upon the tight pulley ln.Thereupon both carriages are moved forward and a corresponding series ofholes are simultaneously bored in the inner sides or edges of bothpieces. The dog p2 being left in range with the pin 133 is engagedthereby as the carriages return and approach the limits of their outwardmovement, thereby turning the inner end of lever P forward, carrying thebelt from the tight pulley upon the loose pulley and automaticallystopping said carriages, which remain quiescent until again started bythe operator in the manner above explained.

It is obvious that the bits may be set by the adjustment of the mandrelsC C to bore single holes or groups of holes at uniform or irregularintervals. The construction and arrangement of the bit-mandrels andtheir supports, and the arrangement of their driving connectionshereinbefore set forth, enable me to bring the bits very close together.in one or more groups, each comprising any desired number of bits, andalso to drive the bitmandrels from shafts journaled in the machine byshort quarter-twist belts. I am also enabled to bore twoexactly-Correspondin g sets or series of holes simultaneously inopposite directions. In place of the tight and loose pulley and thebelt-shifter for automatieally stopping the carriages a clutch with asuitable automatic shifting connection may be substituted. In short,various changes in the construction and arrangement of the componentparts of the machine may be made within the scope of my invention.

My improved machine, as shown and hereinbefore described, is speciallydesigned for boring the holes in the stiles of doors to be put togetherwith dowel-joints and is adapted tobore two stiles simultaneously, thusinsur- IOO IIO

ing perfect uniformity and accuracy in the spacing of the holes, besidesexpediting the work, provision being made for variously grouping andarranging the bits and adjusting the machine for making doors ofdifferent lengths and thicknesses and having any number or arrangementof rails.

I claiml. In a gang boring-machine, the combination of a frame providedwith a longitudinallyarrangcd work-support, anumber oftransversely-arranged bit-mandrels provided with pulleys, the pulleys ofadjacent mandrels being out of line with each other in order to bringsaid mandrels closer together and two longitudinally arranged paralleldriving shafts journaled in said frame and provided with pulleys whichare connected alternately by quarter-twist belts with the pulleys onsaid mandrels, substantially as and for the purposes set forth.

In a gang boring-machine, the combination of a frame, alongitudinally-arran ged carriage movable transversely thereon, a number oftransversely-arranged bit-mandrels provided with pulleys, the pulleys onadjacent mandrels being out of line with each other in order to bringsaid mandrels closer together, and two longitudinally arranged paralleldriving-shafts journaled in said frame and provided with pulleys whichare connected alternately by quarter-twist belts with the pulleys onsaid mandrels, substantially as and for the purposes set forth.

3. In a gang boring-machine, the combinafion of a suitable frame anumber of transverselyarran ged bit-mandrels provided with chucks orbit-holders and with pulleys, the pulleys of adjacent mandrels being'out of line so as to permit of the mandrels being brought closetogether, and two longitudinally-arranged parallel driving-shaftsjournaled in said frame provided with pulleys, the pulleys on adjacentmandrels being connected by quarter-twist belts with pulleys ondifferent driving-shafts, substantially as and for the purposes setforth.

In a gang boring-machine, the combination of a suitable frame providedwith longitudinal ways, a number of bit-supports adjustable lengthwiseof the machine on said ways, and provided with bearings for thebitmandrels, a number of transvcrsely-arranged bit-mandrels supported insaid bearings and provided with bit chucks or holders and with pulleys,the pulleys on adjacent mandrels being out of line with each other, andtwo longitudinal drivingshafts journaled in said frame and provided withpulleys which are adjustable lengthwise thereof, and connectedalternately by quarter-twist belts with pulleys on said mandrels,substantially as and for the purposes set forth.

In a gang boring-machine, the combination with a suitable frame, of anumber of parallel bit-mandrels having bearings therein7 a carriagemovable to and fro endwise of said mandrels and provided with standardshaving vertical sleeves overhanging the bed of said carriage,vertically-movable presserfeet, the shanks of which are movablelengthwise, but held from turning in said sleeves, adjusting screwshaving bearings in said standards and threaded in the shanks of saidpresser-feet, and a shaft having bearings in said standards and providedwith bevel gears which mesh with similar gears on said screws,substantially as and for the purposes set forth.

6. In a gang boring-machine, the combination with a suitable frame, of anumber of bit-mandrels mounted transversely thereon and adjustablelengthwise of said frame, a carriage mounted upon and movabletransversely to said frame and furnished with standards adjustablelengthwise thereof and provided with presser-feet, screws connectingsaid standards and presser-feet and provided with bevel-gears, and alongitudinal shaft provided with similar gears feathered thereon andheld by bearings in said standards in mesh with the gears on saidscrews, substantially as and for the purposes set forth.

'7. In a gang boring-machine, the combination of a suitable frame, anumber of horizontal bit-mandrels arranged transverselythereon,laterally-movable carriages arranged longitudinally upon saidframe at opposite ends of said mandrels, a driving-shaft between andparallel with said carriages and provided at or near its ends withpinions and gears meshing with opposite sides of said pinions andprovided with cranks which are connected directly by rods with saidcarriages so as to move the same simultaneously toward and from the endsof said mandrels, substantially as and for the purposes set forth.

S. In a gang boring-machine, the combination of a suitable frame, anumber of horizontal bit-mandrels arranged transversely thereon, alaterally-movable work-support or carriage arranged longitudinally uponsaid frame, cranks which are connected by rods with said carriage at ornear its ends, a driving-shaft connected by gears with said cranks andprovided with tight and loose pulleys, and an automatic belt-shifter,arranged to be operated by a trip or projection on said carriage,substantially as and for the purposes set forth.

9. In a gang boring-machine, the combination of a frame provided withlongitudinal ways, a number of transverselyarranged mandrel-supportsadjustable lengthwise of the machine upon said ways, mandrels havingbea-rings in said supports and provided at both ends with chucks orbit-holders and between their bearings with pulleys, the pulleys onadjacent mandrels being out of line with each other, two shafts journaled in said frame parallel with said ways and provided with pulleyswhich are connected alternately by quarter-twist belts with the pulleyson said mandrels, two carriages supported parallel with said ways andmovable transversely IOO IIO

theretc toward and from said mandrels, one on each side of the machine,a longitudinal driving-shaft provided at or nea-r the ends of themaehinewith pinions, two gears meshing With opposite sides of saidpinions and provided with crank-pins which are connected by rods Withsaid carriages, substantially as and for the purposes set forth.

l0. In a gang boring-machine, the combination of a suitable frameprovided With longitudinal Ways, a number of transversely-an rangedmandrels supported and adjustable lengthwise of the machine upon saidWays and provided at both ends with chucks and at intermediate pointswith pulleys, the pulleys on adjacent mandrels beingout of line witheach other, two driving-shafts parallel with said Ways and provided Withpulleys, the pulleysV of adjacent mandrels being connected With pulleyson different drivingshafts by quarter-twist belts, vertieally-ad-Ajustable brackets connected with opposite sides of said frame andprovided on their up per sides with horizontal Ways parallel with saidmandi-els, two carriages supported one on each side of the machinelengthwise thereof and movable laterally upon said Ways toward and fromsaid mandrels, two cranks on each side of the machine connected with theadjacent carriage, and a driving-shaft connected by gears With saidcranks, substantially as and for the purposes set forth.

In testimony that I claim the foregoing my own I a-ffr \u my Signaturein presence of two Witnesses.

HENRY Il. ROCKVELL.

lVitnesses:

GHAs. L. Goss, A. A. L. SMITH.

